Java list into map

Table structure: tmdictionary

CREATE TABLE ts_data_dic
(
  ID serial not NULL,
  value_name character varying () is not NULL,-the description of the value corresponds to the
  valu E_code character varying (20),--the corresponding code value
  type_code character varying (a), type_name character varying
  (30),
  comments character varying (m),
  create_by Integer,
  create_date timestamp, without time zone,
  last_ Update_by Integer,
  last_update_date timestamp without time zone,
  row_version numeric (14,0) not NULL DEFAULT 0,
  IsValid Numeric (1,0) not NULL default 1,
  parent_id Integer,
  editable integer NOT NULL default 1,
  sor t integer,
  CONSTRAINT pk_ts_data_dic PRIMARY key (ID),
  CONSTRAINT fk_ts_data_dic FOREIGN key (parent_id)
      REFERENCES ts_data_dic (ID) MATCH
      simple On UPDATE RESTRICT on DELETE RESTRICT
)

The implementation returns a map<valuecode,tmdictionary> based on the incoming TypeCode

  Public map<string, Tmdictionary> findbytypecode (string typecode) {
    	string hql= ' SELECT DISTINCT TM from Tmdictionary TM LEFT Join Tm.parent parent where  tm.isvalid=:isvalid and Tm.typecode=:code ";
    	map<string,object> params = new hashmap<string, object> ();
    	Params.put ("IsValid", 1);
    	Params.put ("code", TypeCode);
		List<tmdictionary> list= (list<tmdictionary>) dictionarydao.query (HQL, params);
        Map<string,tmdictionary> map=new hashmap<string, tmdictionary> ();
        For (tmdictionary  dic:list) {
        	if (dic==null) {
        		continue;
        	}
        	Map.put (Dic.getvaluecode (), DIC);
        }
        return map;
    }

Test code:

@Test public
	void Findbytypecode () {
		map<string, tmdictionary> map= ditionaryservice.findbytypecode (" Lockedname ");
		For (entry<string, tmdictionary> entry:map.entrySet ()) {
			System.out.println (Entry.getkey () + ":" + Entry.getvalue ());
		}
		
	

Original link:

List:

School Number
Name
Class
1
Songjl1
Class 1, Level 01.
2
Songjl2
Class 1, Level 02.
3
Songjl3
Class 1, Level 03.
Convert to map

list<student> list = new arraylist<student> ();
  Map<integer, student> map = new Hashmap<integer, student> ();
  for (Student stu:list) {
   if (stu==null) {
    continue;
   }
   The student is a JavaBean object. Data number, name, class
   //Number as key.
   Map.put (Stu.getstuno (), Stu);
  }